Liquid fuel burner



Dec. 13, 1932.

N. R. THuIBERT LIQUID FUEL BURNER Filed Dec. 8. 1950 4161HWHZ3 IIN'VENTOR BY hzwfazz i Wag i 4o crease thevaporizing efficiency.

Patented Dec. 13, 1932 PATENT OFFICE NAPOLEON R. THIBERT, 0F WORCESTER,MASSACHUSETTS LIQUID FUEL BURNER Application filed December 8,

This invention relates to improvements in' liquid fuel burners adaptedparticularly to be set in domestic stoves and ranges withoutnecessitating material changes therein Whereby they may be operated byliquid fuel instead of other forms of fuel.

This invention further relates to improvements and additions in and tomy liquid fuelt burner set forth and described in my application forLetters Patent filed in the United States Patent Office on or aboutSeptember 13, 1930 and given the Serial Number 481,695.

rllhe principal objects of the invention are to provide an improved capor sleeve for the vaporizing chamber of a liquid fuel burner of thischaracter which will be resistant to the heat of combustion and will notreadily burn through by the action of said heat but will be long livedand more efficient in its action than prior art constructions and toprovide improved means tojdecrease carbonizing effects in the vaporizingchamber of said burners whereby all of the advantages of my burner ofthe aforesaid application may be obtained and carried out with addedetliciency and economy. ,V l v Other objects of the invention are toprovide improved means of preventing deterioration and burning throughof the walls of the sleeve vor cap of thevaporizing chamber, forpreventing air drafts into said chamber with consequent carbonizingeffects, for breaking up and removing carbon deposits from said chamberand for increasing the vaporizing efficiency of the burner. Anotherobject of the invention is to provide an improved cover for the sleeveor cap of the vaporizing chamber which will be economical to produce andwhich will in- Other objects and advantages of the invention will becomeapparent from the following description taken in con'unction with theaccompanying drawing. t will be apparent that many changes in thearrangement of parts and details of construction can be made Withoutdepartingfrom the spirit of the invention as expressed intheaccompanying claims. I, therefore, do not Wish to be limited to theexact arrangement shown 1930.v ,Serial No. 500,880.

and described as the preferred form only has been shown and descnbed byway of illustration.

Referring to the drawing:

Fig. I is a longitudinal vcross section through a liquid fuel burnerembodying my invention;

Fig. II is a top plan view of the top of said burner, and

Fig. HI is a perspective view of the cap or sleeve of the vaporizingchamber With the top thereof separated and slightly removed therefrom.

In liquid fuel burners of the type described in my application aforesaidithas sleeves has been not only a source of annoy- A ance but has had adetrimental effect upon the sales of said burners as the consumer oftenfound his burner inoperable and replacements could not be made Withoutloss of time, useof the burner, and considerable trouble in going to theagent or the manufacturer for a new part. Where such cast 'iron sleeveswere used there was also a seam or joint at the place where the sleevefitted on the vaporizing chamber which joint caused' an air leak andallowed carbon deposits to be formed in the sleeve and vaporizingchamber., rIt is therefore one of the prime objects of 'y my inventionto yremove these' objections and provide a simple and cheap sleeve forthe vaporizing chamber that Will not pit or burn in holes and will lastindelinitely and which will also eliminate the air current at the jointof the sleeve and Vaporizing chamber; and which will also be moreretlicient in its vaporizing action and willI asthe carbon sist inremoving carbon deposits from the vaporizing chamber.

Referring to the drawing in which corresponding numerals denotecorresponding parts throughout: The sleeve or cap for the vaporizingchamber of the invention is shown applied to a liquid fuel burner of thetype described in my aforesaid application. This burner broadlycomprises a burner base .1, preferably circular in shape, having theannular combustion grooves or chambers 2,

having the shouldered ledges 3 supportin (Y the combustion rings 4 whichare provided with rthe perforations 5. The combustion grooves 2 areconnected with the fuel conduits or passageways 6. Theseconduits connectthe outer combustion grooves 2 with the central vaporizing chamber 7.

The combustion 'rings 4 are annular in shape and fit the shoulderedledges 3 on the base 1. They form between them the combustion chambers11 and12, being in direct communication with the combustion grooves 2.The walls of the rings 4 are perforated at 5 to provide means for heatcirculation. yOver the top of the rings 4 is the cover plate 13.

In the central portion of the burnenis the vaporizin chamber 7. Thischamber comprises a c amber cap or sleeve 17 having a,

separable cover or top 18. The sleeve 17 is made of rolled sheetmaterial having a high resistance to heat such as chromium steel.

lThe sheet stock is rolled into a tube an'd butted on the line 19 havinga seam strap'20 welded or otherwise secured over the seam. The cover 18is also of the same material and so formed as to lit loosely upon thetop of the 'tube and to be retained there by gravity. It will be notedthat the seam strap 20 extends only partially of the seam 19 for a`reason to be explained later. The bottom of the tube is scalloped toform the scallops 21 for a purpose to be described later.

The tube or sleeve `17 lits snugly into the well 22 of the vaporizingchamber 7 to preferably form an air tight union therewith, the end ofthe strap 20 resting on the top thereof. The bottom of the sleeve 17rests on the bottom of the vaporizing chamber. If deslred the strap 20may be plac'ed. on the inside of the sleeve 17 and extend from top tobottomthereof making it air tight along the whole distance of the seam19. The scallops 21 permit the liquid fuelto pass along the conduits 6.These scalloped edges also provide a simple and eiiicient means by whichw eposits in the vaporizing chamber may be broken upand loosened bysimply turning the tube. The loose top 18 has been found to acteiciently when resting loosely upon the top of' the sleeve 17, due tothe fact thatl unless the top 18 is securely held down upon the top of te sleeve, a slight opening will perforce be formed between the upperedge of the sleeve and the top 18, suiiicient to permit passage of airor vapor thereby. The difference in pressures which will occur betweenthe chamber 7 andthe space inside of the inner combustion tube 14 willfacilitate this breathing action. If desired it may be perforated for abreather opening and it then may be securely fastened t-o the sleeve. Ifdesired a baille plate or regulator may be placed within the sleeve asdescribed in my aforesaid application.

The operation of the burner is the same as that described in myaforesaid application. The burner may be supported by a stand 23 ifdesired or in any preferred way.

The action of the vaporizing chamber has been considerably improved bythe addition of my heat4 resisting sleeve 17. The chromium sheet steeldoes not become pitted and perforated vfrom the action of the heat. Itresists without apparent deterioration the intense heat to which it issubjected. The sleeve extends through 'the well 22 to the bottom of thevaporizing chamber, the air joint at the top of the well is avoided andthere is hence less tendency to carbonize in its neighborhood. It hasbeen found that the vaporizing tendency is increased as the length ofthe sleeve 17 is increased, hence by proper selection of the length ofthe sleeve the vaporizing effect maly be determined.

he vaporizing cap or sleeve 17 is not only heat resisting in its naturebut is also nonoxidizing aswell whereby it remains clean and practicallyfree from deposits and carbonized collections. The sleeve 17 alsoprotects the walls 22 of the well and prevents the pitting and burningout of this portion of the base, thus prolonging the life of the burnerand insuring a higher vaporizing eiliciency in the vaporizing chamberand in the sleeve thereof.

From the foregoing description it will be seen that l have providedsimple, efficient and economical means for obtaining all the objects andadvantages of the invention.

Having described ymy invention l claim:

1. ln a burner of the character described, a base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a well, forming a vaporizingchamber, and a vaporizing sleeve composed ot material having higher heatresistance than cast iron spaced 'from and independent of saidcombustion chamber and extending from the vaporizing chamber, up withinand beyond the-walls of said well, to a location adjacent saidcombustion chamber for heating thereby, means to supply liquid fuel tosaid vaporizing chamber, and means establishing communication betweensaidchamber and said fuel channel, comprising a conduit positionedtoform an additional vaporizing chamber.

' 2. ln a yburner of the character described,

a base member` having a fuel channel, a combustion chamber above saidchannel comprising upstanding perforated walls, said base member havinga well, forming a vaporizing chamber, and a vaporizing sleeve composedof material having higher heat resistance than cast iron spaced from andindependent of said combustion chamber and extending from the vaporizingchamber, up within and beyond the walls of said well, to a locationadjacent said combustion chamber for heating thereby, means to supplyliquid fuel to said Vaporizin g chamber, and means establishingcommunication between said chamber and said fuel channel, comprising aconduit positioned to form' an additional vaporizing chamber, the levelof the bottom of said conduit being located below the level of said welland below said channel.

3. In a burnerof the character described,

a base member having a fuel channel, a combustion chamber above saidchannel comprising upstanding perforated walls, said base member havinga well, forming a vaporizing chamber, and a vaporizing sleeve composedof chromium steel,spaced from and independent of said combustion chamberand extending from the vaporizing chamber, up within and beyond thewalls of said well, to a locatin adjacent said combustion chamber forheating thereby, said sleeve having a removable cover across its upperend, means to supply liquid fuel to said vaporizing chamber, and meansestablishing communication between said chamber and said fuel channel,comprising a conduit positioned to form an additional vaporizingchamber.

4. In a burner of the character described, a base member having` a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a well, forming a vaporizingchamber, and a vaporizing sleeve composed of material having higher heatresistance than cast iron spaced from and independent of said combustionchamber and extending from the bottom wall of the Vaporizing chamber, upwithin andbeyond the walls of said well, to a location adjacent saidcombustion chamber for heating thereby, a portion of the wall of thesleeve within the vaporizing chamber being cut through, means to supplyliquid fuel to said vaporizing chamber, and means` establishingcommunication between said chamber and said fuel channel and throughsaid cutout portion, comprising a conduit positioned to form anadditional vaporizing chamber.

5. In a burner of the-character described, a base member having a fuelchannel,a combustion chamber above said channel comprising upstandingperforated walls, said base member having a well. forming a vaporizingchamber, and a vaporizing sleeve composed of material having higherheatresistance than cast iron spaced from and independent of saidcombustion chamber and extending from the bott'om wall of the vaporizingchamber, up within and beyond the walls of said well, to a locationadjacent said combustion chamber for heating thereby, a portion of thewall of the sleeve within the vaporizing chamber being cut through,means to supply liquid fuel to .said vaporizing chamber, and meansestablishing communication between said chamber and said fuel channeland through said cutout-portion, comprising a conduit positioned tofform an additional vaporizing chamber, the level of the bottom of saidconduit being located below the level of said well and below saidchannel. .Y

6. In a burner of the character described, a base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a well, forming a vaporizingchamber, and a vaporizing sleeve composed of material having higher heatresistance than cast iron spaced from and independent of said combustionchamber and extending from the bottom wall of the vaporizing chamber, upwithin and beyond thejwalls of said well, to a location adjacent saidcombustion chamber for heating thereby, a portion of the wall of thesleeve within the vaporizing chamber being cut through, said sleevehavlng a covery of the same material as the sleeve across 'its upperend, means to supply liquid fuel to said vaporizing chamber, and meansestablishing communication between said chamber and said fuel channeland through said cutout portion, comprising a conduit positioned to forman additional vaporizing chamber.

7. In a burner of the character described, a base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls. said base member having a tubular well, formingvavaporizing chamber, and a removable tubular vaporizing sleeve composedof material having higher heat resistance than cast iron spaced from andindependent of said combustion chamber and extending from the bottomwall of the vaporizing chamber. up within and beyond the walls of saidwell. to a location adjacent said combustion chamber for heatingthereby, the walls of the well and sleeve forming an air tight joint, aportion ofthe wall ofthe sleeve within the vaporizing chamber being cutthrough. means to supply liquid fuel to said vaporizing chamber, andmeans establishing communication between said chamber and said fuelchannel and through said cutout portion, comprising a conduit positionedto form an additional vaporizing chamber.

8. In a burner of the character described, a base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a tubular well, forming avaporizing chamber, and a removable tubular vaporizing sleeve composedof material having higher heat resistance than' cast iron spaced fromand independent of said combustion chamber and extending from the.vaporizing chamber, up within and beyond the walls of said well, to alocation adjacent said combustion chamber for heating thereby, the wallsof the well and sleeve forming anjair tight joint, said sleeve beingprovided with a breather member adjacent its top, means to supplyliquid` fuel to said vaporizing chamber, and meansestablishingcommunication vbetween said chamber and said fuel channel, comprisingaconduit positioned to form a additional vaporizing chamber.

9. In a burner of the character described, a base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a tubular well, forming avaporizing chamber, and a removable tubular vaporizing sleeve composedof material having higher heat resistance than cast iron spaced fromandy independent of said combustion chamber and extending from thebottom wall of the vaporizing chamber, up within and beyond the walls.of said well, to a location adjacent said combustion chamber for heatingthereby, the walls of the well and sleeve formingan air tight joint, aportion of the wall of theslecve within the vaporizing chamber being cutthrough. said sleeve being provided with a breather member adjacent itstop, means to supply liquid fuel to said vaporizing chamber, and meansestablishing communication between said chamber and said fuel channeland through said cutout portion` comprising a conduit positioned to forman additional vaporizing chamber. K

10. In a burner of the character described,

a base member having a fuel channel, a combustion chamber above saidchannel 'comprising upstanding perforated walls, said base member havinga well, forming a vaporizing chamber, and a vaporizing sleevecomposed ofsheet material having higher heat resistance than cast iron spaced fromand independent of said combustion chamber and extending from thevaporizing chamber. up withheatino` thereby, said sheet ysleeve beingshaped, to closely lit the walls of the well and form an air tight 'ointtherewith and the longitudinal edges o the sheet being secured tgetherland sealed'to form an air tight joint' longitudinallyA thereof, means'to supply liquid fuel to said vaporizing chamber, and meansestablishing Icommunication between said chamber and said fuel channel,comprising a conduit positioned to form an additional vaporizingchamber.

' 11. In a burner ofthe character described, a base member having `afuel channel, a combustion chamber above said channel comprisingupstanding perforated walls, saidl base member having a Well, forming avaporizin'g chamber, and a vaporizing sleeve composed of sheet materialhaving higher heat resistance than cast iron spaced from and independentof said combustion chamber and extending from the bottom wall of thevaporizing chamber, up within and beyond the walls of said ,well, to alocation adjacent said combustion chamber for heating thereby, saidsheet sleeve being shaped to closely fit the walls of the well :and forman air tight joint therewith, and the longitudinal edges of the sheetbeing secured together and sealed to form an airy tight joint.longitudinally thereof, a portion of the wall of the sleeve within thevaporizing chamber being cut through, means to supply liquid fuel tosaidvaporizingchamber, and means establishing communication between saidchamber and said fuel channel and through said cutout portion,comprising a conduit positioned to form an additional vaporizingchamber.

12. In a burner of the character described, ay base member having a fuelchannel, a combustion chamber above said channel comprising upstandingperforated walls, said base member having a Well, forming a vaporizingchamber, and a vaporizing sleeve composed of sheet material havinghigher heat resistance than cast iron spaced from and independent ofsaid combustion chamber and extending from the vaporizing chamber, upwithin and beyond the walls of sqaid well, to a location adjacent saidcombustion chamber for heating thereby, said sheet sleeve being shapedto closely fit the walls of the well and form an air tight jointtherewith and the longitudinal edges of the sheet being secured togetherand sealed to form an air tight joint Vlongitudinally thereof, saidsleeve being provided with a breather member adjacent its top, means tosupply liquid fuel to said vaporizing chamber, and means establishingcbmmunicating between said chamberl and said fuel ichannel, comprising aconduit positionedv to form an additional vaporizing chamber.

NAPOLEON R. THIBERT.

